[python] Fix deprecation warnings [release-1.14]

[johnkerl]

Issue and/or context: #2998 was (it turns out) incomplete and did not fail until after 1.14.0 was tagged. :(

Fixes https://github.com/single-cell-data/TileDB-SOMA/actions/runs/10912549693/job/30287424101#step:13:6876

See also #2999 [sc-53002]

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 89.79%. Comparing base (7323987) to head (9335541).
Report is 1 commits behind head on release-1.14.

Additional details and impacted files

@@               Coverage Diff                @@
##           release-1.14    #3013      +/-   ##
================================================
+ Coverage         89.64%   89.79%   +0.14%     
================================================
  Files                40       40              
  Lines              4096     4096              
================================================
+ Hits               3672     3678       +6     
+ Misses              424      418       -6     

Flag	Coverage Δ
python	89.79% <20.00%> (+0.14%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
python_api	89.79% <20.00%> (+0.14%)	⬆️
libtiledbsoma	∅ <ø> (∅)